Machine for making lamp-bases.



PATENTBD JUNE 11, 1907.

N. MARSHALL. MACHINE FOR MAKING LAMP BASE.

APPLICATION FILED SEPT-20,1906.

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MACHINE FOR MAKING LAMP BASES. APPLICATION FILED SEPT. 20. 1005.

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No. 856,972. PATENTED JUNE 11, 1907. N. MARSHALL.

MACHINE FOR MAKING LAMP BASES.

APPLIUATION FILED SEPT. 20.1905.

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/ I w Q A 7 M 14AM mavvgg No. 856,972. PATENTED JUNE 11, 1907. N. MARSHALL. MACHINE FOR MAKING LAMP BASES.

APPLIOATION FILED SEPT. 20. 1905.

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UNITED STATES PATENT OFFICE. Y

NORMAN MARSHALL, OF NEWTON, MASSACHUSETTS.

MACHINE FQRJVIAKING LAMP-BASES.

I Specification of Letters Patent.

Patented June 1 1, 1907.

Application filed s eater 20,1905. S rial N 279,291.

ufacturing bases for incandescent lamps in which the outer shell and center terminal are united by a web of glass or other fusible insulating material. y

i In machines of this character as heretofore constructed, an example of which is shown in the patent to Swan No. 774,403 dated Noven'iber 8, 1904, the metallic shell of the base and the metallic center contact have been introduced into the molds within which the bases are formed, by the operator, the introduction of the mol 1 on glass and molding of the glass, and the ejecting of the finished base being automatically performed by the machine.

It is the purpose of the present invention to combine with the other mechanisms involved in the automatic manufacture of the bases, mechanisms for automatically feeding and introducing the metallic shells and center contacts inlo ihe molds so that the o aerations incirioni lo the manufacture o. the completed base may be automatically and rapidly performed during the operation of the machine.

In emlicdying the broader features of my invention in sin'iple and eflicientmechanisms, I have UillPlUyOLi certain further features of invention relating more especially to the construction and arrangement of the separating and feeding devices for the shells and contacts which are not essential to the broader features of invention but are of importance in contributing to he efficiency and reliability of the machin The various ldatiires ofthe invention will her-understood from the following detailed description of the i'nechanisms in which I have embodied them and will be set forth is necessary cn't 'lXlVlll'lOll.

in the claims.

In'the accompanying drawings-Figure 1 is an elevation of so-much of the machine as to an understanding of the pres- Fig. 2"is an enlarged seciiopal." detail showing the construction of mold and the mannerof' supplying molten lass or 'other insulatin material thereto. p v .2: r v

I rious operations, by

rier and operatin mechanism therefor and the mechanisms for feeding the shells and contacts, the glass furnace and molding mechanism being omitted for the sake of clearness. Fig. 4 is a detail elevation showing the mechanism for separating and feeding the center terminals. Fig. 5 is a vertical sectional View showing the devices for transferring the center terminal from the end of Fi 3 is a lan View showin the mold car I n P b the feed chute to the mold. Fig. 5 is an enlarged section on line i -13 Fig. 5. Fig. 6 is a detail. plan view showing the devices at the end of the feed chute. larged sectional view of the devices at the end of the feed chute. Fig. 8 is a front elevation of the devices shown in Fig. 7. Fig. 9 is a transversely of opening Figs. 10 and '11 are views of the Fig. 12 is a plan view of the Fig. 13 is an enlarged Fig. 7 is an envertical sectional view 90 Fig. 7. center contact. hopper of the shells. elevation showing the devices at the lower end of the feed chute for the shells. Fig. 14 is a plan view showing the lower end of the feed chute. Fig. 15 1s a vertical sectional I view showing the devices for transferring the shells from the end of the feed chute to the I molds.

Fig. 16 is a transverse sectional view through the feed chute for the shells. l Fig. 17 is a view showing the metallic shell I for the lamp base. F Inthe machine shown in the drawings a 1 series of molds or receptacles A shaped to rei ceive the outer shell and center contact of the lamp base and to hold them in proper reration to each other, are mounted upon a rotary carrier A and by the movement of this carrier each mold isbrought into position toreccive the center contact, then into position to receive the outer shell, then into position beneath the discharge outlet from the glass furnace, then into osition beneath the molding devices, and inally into position where the completed base is removed from l the'mold. I i The rotary carrier A may be iven the proper intermittent movements to bring the molds successively into position for the vaany suitable operating mechanism, and in the construction shown is given such movements by means of a crank pin A carried by a constantly rotating shaft and arranged to engage radial slots A formed in a disk which is secured. to the shaft A upon which the carrier is mounted. The shaft A to which the crank pin A is secured 2 ing in the carrier A is also provided with a segmental loclgin l as shownin Fig. 2.

,. is also recessed at a? to receive t disk A which cooperates with segment-a locking surfaces A formed on the slotted disk, the engagement of the segmental disk A and surfaces A acting to lock the mold carrier in position between successive movements.

The molds may be of any suitable construction and are conveniently constructed As shown in this figure the mold consists of a cylindrical tube a se} cured to the carrier A, the tube held of pro ersize to receive the metallic outer 51611 of t e lam base and forming theouter walls ofthe mo d. The bottom ofthe mold is formed by the upper-end of a plunger 0 which is recessed at a to'receiveithe center contact and retain it in-proper osition-iand e lower end .of the shell. The plungefiaf is jirovided with a flange a, and is eldcmnormal position by means of a s ring a introduced'betweenthe flange a an the fixed plate a? which carries the tube a. The plunger a; is. supported against the tension of-the spring by engagefixed stud a) secured to thecarrierA 12 secured to the shaft tating device.

- .Within the ho feed chute by means of ratorinthe' form of a slide B which is-mount ed' in a transverse =tacts-for the ment with a'bara extending across the openis mounted, and-'the-plunger is guided-upon 3 an extending up within the plunger; With this constructionthe plunger of acts to su port the parts during the forming of t e a'seand may then be raised against the tension of the 's ring to eject the finished base from the mo (1-.

The mechanism for feeding the center contacts into position above the molds and for introducin he contacts intothe molds is shown in i s. 1 and 3-8. The center con ases, which the machine being described is designed to manufacture, are 0 the-form shown 1n Fi s. 10, and 11, and con sistsof a thinmetal' disk 5 having a hollowstern 4. A quantity of; these contacts arelaced in a hopper Bwithm which is a rotary rush or other agitating device, driven by means of a belt I) which. sses over a pulley w 'ch carries the agi- The wall of the hopper is provided with one ormore openings corresponding inshape to the shape of the centercontact and as .the contacts are agitated ppet; certain of themregister with the opemng or openmgs in the wall of the hopper and pass through said opening or openings and into a feed chuteiB. These contacts slide down the feed chute B which thus becomes filled with a series of contacts; the contact at the lower end of the series engaging a spring stop B"; Individualfcon tacts are separated from the series in the deway B arranged. at e uid'ewey: "fl-he slide the lower endlet t I bevel front end, the iii-Y B is provided with a 'forfeeding I end of the slide as it advances,

jaws B B whichare mounted up The fixed jaw B of the receive the flared upper end within which the plunger beneath the plate movement of'the plunger into the receptacle A. "As the plungfer-approaches its lower a reciprocating sep which is held in engagementqwith the clined surface B of which forms a cam surface the contactat the end of the series in the feed chute forward past the yielding stop B and into position above the mold. The slide B is so arranged that the pointed asses back of the stem 4 of the contact at t e end of the feed chute, and during the continued forward movement of the slide, the inclined surface B acts against this stem to force the contact forward, I This forward movement of the contact brings the stem 4 between the ower end of a reciprocating plunger B and vform a carrier for transferrlng the terminals from the feed chute to the receptacles A. carrier is recessed to of the stem and ism-providedwith a lip?) which lies at one side of'the disk 5. The oted at b. and is forced toward the fixed jaw by a sprin b The lower end of the jaw B 'is extended aterall tounderlie the flared end of the stem 4 an maybe. provided with are-' cess for-engaging the stem.

When the plunger B is in its upper position the carrying jaws are in position at the end of the {feed chute B and above an opening'B intheplate 13*". At this time the jaw B is held away from jaw B? by the engagement of a pin b with a fixed stop 6 so that the stemof the contact may pass between the jaws. The contact is prevented from dropping throu at the outer'end of t e stem; l

The feed chute and plate B are so arranged that the intermittent movement of the carrier A brings the-receptacles successively intoposition to register with ,the openmg on themovable jaw B is piv-v l3" in the plate B During the time 1 that the receptacle remains at rest directly B the plunger B is deh. thejawsby the flare pressed. As the plunger starts downward the pin, b onthe' movable jaw. LB moves.

away from the stop I) so that the .'aw is: forced against-t e stem of the contact spring 1). During the continued downward B the jaws carry the contact downward 4 "osition a pin 7) on t e jaw B engagesa fixe stop If thus'opening osition in the botacle; glpon the return of tomof the rece e pim'b strikesthe stop b the plunger B? t -o ening the jaws ready the-reception of t e succeeding; terminal ire the jaws and releasingithe terminal which drops'into The plunger Bl] amounted-to reciprocate in a; head-B "carriedbyabraelmt'B? an'dis bifurcated at its end to receive a cam which is secured o a constantly rotating cam shaft B; The plunger"-can'ies,,.a r01 1} camBby SPIIKgST'B and -the plun r isslotted at for .thepassage of the-aha B? andito accommodate the movements of the plunger under 'the action of -the cam B and spring B tween successive movements of the mold carrier A.

The slide B is reciprocated in proper time to separate individual contacts and feed them to the carrying jaws by means of a lever B pivoted to the bracket B and having its lower end arranged to engage an opening in the. slide B. This lever is operated by a cam'B secured to the cam shaft 13 and engaging a roll B carried by the lever, the roll being held in engagement with the cam by a spring 13. V

The molds are carried by the carrier A from the position where they receive the center contacts, to position beneath the lower end of a second feed chute C from which the nieti'illic shells are transferred to the molds. The feed chute C is constructed and arranged to guide and ,support the' metallic shells which, in the form of base for which the machine being described is designed to manufacture, are of the shape shown in Fig. 17.

These shells 'oonsist of thin sheet brass drawn up into cylindrical shape and corru gated to form a screw-threaded cylindrical portion and are provided with a curved inwardly projecting flange 2 at their lower ends.

The shells are supplied to the feed chute C from an inclined hopper C arranged at the upper end of the inclined chute and pro vided around the lower edge of its periphery with a'series ol openings C so shaped that the shells may pass through the openings, provided they register therewith in proper relation, that is to say with the curved lower end of the shell resting against the bottom of the hopper. The bottom of the hopper is stationary, while the cylindrical part of the hopper within which the recesses C are formed is constantly rotated by means of a belt C passing about the outer peri hery of the hopper. As the hopper revo ves the shells within the hopper are agitated and carried up to a greater or less extent by frictional engagement-with the walls'of the ho per and .certain of the shells will propery register with the openings C and pass through said openings as the hopper revolves. These shells will pass into the upper end of the feed chute and slide down said chute, forming a series of shells extending to the lower end of the chute, the end. shell of the series resting against a fixed stop C at the end otthe chute.

Thelower edge of the hopper is surrounded by, an upwardly. rojecting flange C which extends aboutt e greater portion of the hoqperand prevents the escape of the shells t ough the openings C". At that pertion of the hop er which is adjacent to the upper end of tie feed chute and which is traveling upward from the lower edge of the hopper, the .flange C is arranged at a distance from the periphery of the hopper sufficient to allow the passage of the shells throu h the openings C as indicated in Fig. 12. s the openings C in the lower edge of the hopper pass opposite this part of the flange C any she ls which may have entered the openings slide downward through the openings into the guideway C formed between the flange C and the, outer periphery of the hopper, and slide down this guideway into the up er end of the feed chute C. In order to avoir injury to the shells in case they are carried up between the flange C and the traveling periphery of the hopper, or in case they pass but partially through the opening C-, the upper part of the flange 0". which extends inward toward the eriphery of the hopper at the upper end of t e guideway C, is 'made yielding. In the form. shown this portion C of the flange C is formed of spring metal which curves inward from the rigid part of the flange C which forms the outer wall of the guideway C and forms a yieldin cam surface for forcing the shells which have passed but artially through the openings C back into t e openings as they pass upward toward the upper part of the hopper.

The feed chute C is so arranged that the shell which is in position against the fixed stop C is dire'etly above one of the molds A during the interval between the successive movements of the mold. sition the shell is supported by two spring fingers C and is directly beneath a vertically reciprocating plunger C" the downward movement of which carries the shell from the end of the feed chute down-into the mold,

the spring fingers C yielding to accommodate the downward movement of the shell and assisting in maintaining the shell. in oroper alinement with the mold. The lower end of the plunger C is shaped to enter the shell and is also recessed to embrace the stem 4 of the center contact as the pluner completes its downward movement.

he lunger is mounted in the head 0 carried y the bracket B and its upper end is bifurcated to receive a cam C secured to the shaft 13 which is held in engagement with the cam by means of s ring C and the plunger is slotted at C for t e passage of the cam shaft. plunger C is operated in unison with the WVhen in this )o-' The plunger carries the roll 0.

The

plunger B and is advanced and retracted,

during the interval between movements of the mold carrier.

After the center contact and shell have successive movements of the mold carrier, into osition,

' remains beneath the dischar e orifice. After the glass has thus been supp 'ed to the mold, the mold is brought by the movement of the mold carrier, into position below the-molding lunger F and stripping plate F. The mol 'ng plunger and stripping plate are carried upon two reciprocating rods F F 3 which are operated at proper intervals by suitable mechanism not shown.

, After the molding has been performed and the stripping plate and molding plunger returned to normal position, the mold is advanced and is brought by the movement of the mold carrier into position above the ejector-pins G indicated in Fig. 1. These pins are reciprocated at proper intervals by mechanisrnfnotshown and as they rise they pass up oifo posite sides of the bar a and act.

against't e flange a to force the plunger 0/ of the mold upward against the tension ofthe spring a thus forcing the com l'eted base up out of the mold where it may e knocked off of the upper end of the plunger by an air Hag: or in any suitable manner.

scrib dd the various operations involved in assembling the metallic parts of the base and uniting them by aweb of molded insulating material, may be automatically and rapidly performed without manual manipulation or assembling of parts by the operator, and

thus the rapidity ofoperation is increased and the cost of production reduced materially. While I have shown and described a machine in which both the shells and the center contacts are automatically separated and-introduced into the molds, it will be understood that mechanisms for introducing either of these parts into the molds automatically may be combined with advantage with the mechanisms for supplying the insulating material and the moldi mechanism, the other part heing introduce into the molds in the same manner as heretofore.

Without attem ting to set forth in detail the various modi cations and changes which 'may be made the mechanisms Without de-. partingfrom my invention, what I claim and desire to secure b "Letters Patent is 1. Agnachine or making lamp bases hav ingingiombination a receptacle for the base arts, 9. feed chute for center contacts having ts delivery end arranged to register with the receptacles, means for separating and deliveringiglenter contacts to said feed chute, mec sin for separatin individual contacts from the series in t e feed chute and transferring them to the receptacle, means the combination of mechanism de-' for feeding an. insulating compound' -tc -unite v the parts, and mechan sm for shaping the compound.

2. A machine for making lamp bases having incombination 'a receptacle forthe base parts, a. feed chute for center contacts having its delivery end arranged to re ister with the receptacle, a hopper for supp ying contacts to the feed chute, a stop for engaging the end contact in the. feed chute, a separating device for feeding the end contact past the stop, a reciprocating plunger for carrying.

the contact into the receptacle, means for feeding an insulating compound to unite the parts, and mechanism for shaping the compound.

3. A, machlne for making lamp bases having in combination a rece tacle for the base parts, a feed chute for t e center contacts having its delivery end arranged to register w'ith the rece tacle, means for supplying contacts to the eed chute,la stop at the end of the feed chute, a carrier in advance of the sto a separator for feeding the end contact feed chute and the receptacle, and means for opening and closing the jaws.

5. A machinefor making lamp bases having In combination a rece tacle for the base parts, a feed chute for t e center contacts aving its delivery end arranged to register with the receptacle, a yielding stop at the delivery end of the feed chute, a reciprocating slide provided with an inclined cam surface arranged to pass behind the stem of the contact and force the contact past the yielding stop, a carrier for receiving the contact,

means for opprating the carrier to deliver the contact to t e receptacle, means for feeding an insulating compound to the receptacle,

and mechanism for she ing the compound.

6. A machine for ma g lamp bases hav- A machine for making lamp bases havf ing in combination a series of receptacles for the base parts, a feed chute for the center contacts, mechanism for separating individual contacts from the series in the feed chute,

and transferring them to a receptacle, a feed chute for the shells, mechanism for trariswith the means for supplying insulating material and with the shaping mechanism.

7. A machine for making lamp bases having in combination a receptacle for the base parts, a feed chute-for the center contacts, a carrier at the end of the feed chute, devices for transferring individual contacts from, the

.chute to the carrier, a feed chute for the shells, a carrier at the end of the chute, means so for supplying an insulating material, mechanism for sha ing the material, mechanism.

In witness whereof, I have hereunto set my 1 5 hand, this 9th day of Se tember 1905.

'NORlV N MARSHALL.

In the presence of IRA L.-F1sH, KATHARINE A. DUGAN. 

